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Étude d’une machine supraconductrice à flux axial pour une application aéronautique

Abstract : The world is electrifying, especially the world of transport. Global warming and air pollution are the cause, which promotes electric power as a solution to the energy transition. Electricity is more and more a factor of decarbonation with renewable energies. Moreover, the use of this energy is efficient. The efficiency of electric motors can be more than 90% compared to 30% for internal combustion engines. If the possibility of transporting a large number of passengers on the ground with electric energy is a reality, it is different in the air. But change is on the way thanks to projects such as Solar Impulse, the famous solar airplane that has circumnavigated the world in several stages. These projects show that the technology is almost ready. The concern for improvement in the aeronautics industry concerns the mass of equipment. For an all-electric aircraft, the storage of electricity and the electromechanical converters must be more efficient than current technologies. Electrical storage is one of the key issues in the energy transition. The solutions are diverse and can be mechanical (flywheel), electrochemical (fuel cell, batteries), electromagnetic (superconducting coils, supercapacitors) or thermal (latent heat). Electric power generation or motorization is the second aspect of the transition. Permanent magnet electric motors currently have the best power-to-weight ratio, also known as power-to-weight. But this is still insufficient, which is why breakthrough technologies are being studied, such as the use of superconducting materials. The objective of this thesis is to study superconducting materials which have the particularity of having no loss when an electric current flow through them. We can therefore quickly see an advantage concerning their integration in electrical machines. They make it possible to increase the magnetic field in the air gap of an electrical machine and to reduce its volume and mass. This is an important research topic of the GREEN laboratory of the University of Lorraine in Nancy with which this thesis was carried out.
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Submitted on : Thursday, September 3, 2020 - 2:47:06 PM
Last modification on : Friday, October 23, 2020 - 4:59:04 PM
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Alexandre Colle. Étude d’une machine supraconductrice à flux axial pour une application aéronautique. Energie électrique. Université de Lorraine, 2020. Français. ⟨NNT : 2020LORR0036⟩. ⟨tel-02929485⟩

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